Telescopic shafting arrangement



June 3, 1952 G. GARNIER TELESCOPIC SHAFTING ARRANGEMENT 2 SHEETS-SHEET l Bad I Original Filed Aug. 9, 1945 June 3, 1952 G. GARNIER TELESCOPIC SHAFTING ARRANGEMENT Original Filed Aug. 9, ,1945

2 Sl-IEETS-Sl-IEET 2 Patented June 3, 1952 TELESCOPIC SHAFTING ARRANGEMENT Georges Garnier, Paris, France, assignor to Air- Equipment, Paris, France, a French company Original application August 9, 1945, Serial No. 609,826. Divided and this application April 11, 1947, Serial No. 740,774. In France September Section 1, Public Law 690, August 8, 1946 Patent expires September 7, 1962 m 15 Claims. 1

The subject-matter of this application is di-' vided from the patent application Serial No. 609,826, filed August 9, 1945.

The present invention relates to the problem of the driving of auxiliary parts or apparatuses, for instance on board aircraft. This driving is generally performed through the agency of gear boxes, a Cardan shaft or the like device, forming part or not forming part of the gear box, for connecting the latter with a motor and for allowing thus the gear box and the different auxiliary parts to be driven.

The known gear boxes in which fiuted couplings allowing a knee-joint motion connect the ends of this driving shaft with the motor and with the gear box itself respectively, show the drawback of requiring the dismantling of the gear box or of the motor before the driving shaft may be removed in its turn.

The present invention aims chiefly at removing this drawback and has for an object to provide a driving shaft comprising at least at one end longitudinal coupling splines and at least two coaxial sections coupled together, so as to be capable of a longitudinal motion one with reference to the other, means being moreover provided for holding the two sections in a number of selected relative positions. It is thus possible to disconnect the splined end without dismantling any further element; if both ends are splined, it is then possible to remove the shaft without touching the remainder of the transmission system.

This arrangement may be completed by a bearing which is secured to a'partition and carries an auxiliary shaft leading to the gear box. Preferably the auxiliary shaft is connected through a Cardan joint with said intermediate bearing and with the gear box and there is associated therewith at least one joint allowing longitudinal sliding and inserted in this connection between the auxiliary shaft and the gear box. In a preferred form of execution this intermediate bearing is rovided with two universaljoints rotating integrally together, arranged preferably coaxially and provided each with a splined hole inside which is engaged the end, also splined, of the auxiliary shaft or of the driving shaft, as the case may be, which ends in the hole considered.

The driving shaft comprising sliding sections may thus remain the same for a given driving frame whatever may be the position occupied by the gear box to the rear of the fire wall.

Appended drawings show by wayof example and by no means in a limitative sense several forms of execution'of the shafting arrangements adapted to drive auxiliary parts on board aircraft and designed in accordance with the above disclosed features. 7 v

In said drawings:

Figs. 1 and 2 are axial cross-sections of a telescoping shaft driving a gear box carrying'auxiliary parts, said shaft being illustrated in its retracted position in Fig. 2 and in its extended position in Fig. 1.

Figs. 3 and 4 are views similar to Figs. 1 and 2 of a modified formof execution of the telescoping shaft.

Figs. 5 and 6 show, partly in elevation and partly in axial cross-sectional view, the combination of an intermediary bearing secured to the fire wall with the telescoping shaft.

In the form of execution of Figs. 1 and 2, only the nose I of the gear box has been shown and through this nose passes the driving shaft 2 driven by the transmission means 3 of the motor. This shaft is constituted in the example shown by two coaxial sections 4 and 5 of which one, 4, is tubular and surrounds the other to which it is slidingly coupled through inner splines 6 provided at one of its ends and meshing with shorter splines I provided on an enlargement of the section 5. At this same end of the section 4 is arranged a ring 8 or any other suitable stop adapted to prevent the section 5 from passing out of the section 4. The section 5 extends inside the section 4 beyond the enlargement carrying the splines I and carries a guiding head 9 sliding inside the bore provided in an aluminum lining l0 fitted in the steel section 4. A spring ID has its ends bearing respectively against the lining l0 and against the enlargement of the section 5 and urges apart from one another the sections 4 and 5 and a locking device holding the two sections as desired in the extreme positions corresponding to a minimum and a maximum length for the shaft is constituted by balls ll housed in a recess passing radially through the enlargement of the section 5; these section carries in its turn a universal-joint 19 the cup-shaped bearings for which are journaled in the nose I of the gear box.

Obviously such: a shaft as described may be instantaneously disconnected with reference to the motor, as apparent from Figs. 1 and 2 while remaining secured to the gear box through the stationary universal-joint [9.

Figs. 3 and 4 show a telescopic shaft constituted like the shaft 45 described hereinabove with afew modifications in form. --In-the embodiment shown in Figs. 3 and 4, .the :telescopic shaft comprises two coaxial rsectionsqflwand 5a., but the section 5a instead of carrying, a: universaljoint, carries like the section 4a a splined head 2| engaging the axial bore, also-splined of an universal-joint 22. The shaft thus.constit11tedi is disconnectable at both ends. The section 50. carries a guiding head 9a sliding inside the bore provided in the aluminium lining lOa fitted in the..-steelrsection,la.,,A springlflaehas its ends bearin .re p tiwe1y..-a a nst-.thedinin lllc and againsnan ,enlargement of the section '5aand .18.85 apart from. onee-anotherqthe:=sections- 4a and 5a. A locking device, forsheldtn thetwo sections in the position corresponding-to a minimum le th tor :the, shaft; is. constituted byaballs lzl a .housed in ,recesses; passing-- arad-ially. through the .liningl-Oak Said-halls are urged inwardly, by the free :ends rat-laminated springs 2w riveted at H2 on the lining Illa, and copperatewitlra circular Il'i01l'P1Q id i Q h mfiq iolizl c ing the two-members in a selected :position. The tubular member 4a is slidingly coupled ,--with member'- 5a..throughinner splines Ba -provided at one of. its ends; and,meshingwithgouter splines la provided. on arr-enlargement of the. section 5a. Opposite itsesplined end, the tubular member is secured to a splined endpiece -l 5a adapted to be connectedto the ,transmission, means 3a. For holding theshaft-longitudinally -in place, 52, spring 23: is arrangedinside the, head 2land urges it axially. while .,bearing against the bottom of the spherical socket pfit-henuniversal-loint 22.

= In Figs. 5 and 6 the gear-box lyis nowseeured gear-box; thepariia r'shaft 2u-preterab1y-emhe :typedisclosed? hereinabeve, leadsi van intermediate 'bearingzzfi Ethe .twosu-coaxial.universal :ioint-ball-members: 26:.and 21 :zofvwhich. arev arranged inside; acommon sleeve-;.-28-:.thei inner plines 2 9. of which engage ;.the.=ra1dial. outer. teeth 30 on the-.'.=ball.-members;:2Sand 21 the;.-b'earing clips. onwhich arresecuredtdthis sleeve 2 8. a-This bearing is: secured. :to. the fireewa1l;.24,:.while the splined head :34 1of :theizshafmb sengagesthe universal joint.-b.allmemberz26 and tthe .splined head '35 of. an'auxiliary'shaft 36 engages the..ballmember: 21,. thesppposite head; alsocsplined, of said auxiliary. .ishaft; ending. .atrfthe universaljoint :31 of thetgearebox .al a.

Of course the-.inventionis by .no emeans limited: to the details of execution ishownxordescribed which have .been given-out solely'by way of example.

1. Atelescepic-shafting arrangement :for -.con- .nectinga. driving unitewith a driveng'unit, comp s ng a tubular; imemberazcne .yenddof which provided -with- -inner splines, an end; piece secured etc-sa tubu memh namthemm p inedend Matte-f a er dapte i cdoeaneratmelren- ...tension rigid with the second member and having an enlargement provided at its end, a lining inserted inside the non splined part of the tubular member adapted for guiding said enlargement, a

' 'with'the enlargement and for axially locking the locking device-fixed .on said lining for cooperating two members in at least one selected position and L a spring located inside the tubular member and -restingonthe lining and on the second member so as to yieldingly push said second member with referencetothetubular member.

2.--A =telescopic shafting arrangement as in claim 1, wherein the disconnectable ball joint arrangement comprises a splined head forming one piece with the second .member and a universal joint having a: .splined Jaxial- .Lbore for.- sreceiving said splined head.

3. A telescopic shaft-ing :arrangement-asiin claim .1; further having .an auxiliary :-shaft,:. a fire wall and a stationary bearingsecured to-saidwall with two coaxial lmeeejoints.a'daptedr-torotateiin unison round :their axis. and. provided each. with a. splined hole registering efl'EOIIluOl'lEJkl'lBGjfOihli to :the :other and carrying respectively the ziree end of the end piece andone- QIIdZOf- LhGfilDdli-QIY shaft, so that saidiendpiece. andithe auxiliary shaft are pivoted to each oth'er andurotatelin unison.

J 4. A. 'telescopic shafting arrangement for .connecting a driving unit.=with a -driven unit," comprising a tubulaf-member one end of whichis provided with. inner sp'lines-,- anend piece s'ecured to said tubular memberiat the nonsplined end of the latter for operatively co nnecting the said tubular member --with one-ofsaid units; a second member providedawith- Louter splinesadapted to slidingly engage theinner splines of 'said tubular member, a second end-piece secured to said second member opposite -to:the first-end piece, for operatively.connecting the:second member to the otherunit, an extension providedon the second member and extendingiinside the tubular-member to be guided bysaid tubularmember.

5. A telescopic shafting arrangement -as 'in claim 4, further-comprising'a head secured at the free end of said extension and adapted tobe guided by the tubular member.

6. A telescopic Shafting -=arrangement-as in claim 4, further comprising a spring located'inside the tubular:memberahd-resting on said tubular member and--on--'the-secondmember-so as to yieldingly push saidisecond memberwith reference to the tubular member.

7. A telescopic sh'afting. arrangement; as 'in claim .4, further comprising. atleastone-ldcking device stationary withreference to the tubular member for cooperating. with the-saidextension and for axially locking :the two members.

8;;A' telescopictshafting arrangement as.- in .claim, 4, wherein at least one of. theend pieces comprises splines: andithe corresponding unit comprises splinesadapted-for operativelyengagingthesplinesof said :endpiece.

, 9. A telescopic shafting arrangement :as claimed in claim 8, further comprising aispring located inside thegendi piece and the corresponding unit; for-holdingathe shaft longitudinally in place with reference to said unit.

10. A telescopic ;.;shaft-ing arrangement as 1a.i.med n: claim "if-further comprisin aluelrins device stationary with reference to one of the two members for axially locking said members in at least one selected position.

11. A telescopic shafting arrangement as claimed in claim 10, wherein the locking device comprises balls housed in a recess passing radially through the second member, spring means inserted between said balls for urging outwardly the balls and notches provided inside the tubular member for cooperating with said balls.

12. A telescopic shafting arrangement as claimed in claim 4, further comprising a locking device stationary with reference of one of the two members for axially locking said members in at least one selected position, said locking device being located at the splined end of the tubular member.

13. A telescopic shafting arrangement as claimed in claim 4, further comprising a locking I for guiding the extension provided on the second member of the shaft.

15. A telescopic shafting arrangement as claimed in claim 4, further comprising a lining integral with the tubular member and adapted for guiding the extension provided on the second member of the shaft, and a locking device fixed on said lining for axially locking said members in at least one selected position.

GEORGES GARNIER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 935,885 Blake Oct. 5, 1909 1,165,031 Stahlnacka Dec. 21, 1915 1,337,378 Winskas Apr. 20, 1920 1,381,900 Barnes June 21, 1921 1,881,609 Huwe Oct. 11, 1932 2,291,593 Hubbard July 28, 1942 FOREIGN PATENTS Number Country Date 16,241 Switzerland Mar. 8, 1898 

